MySQL Workbench requires a current system to run smoothly. The minimum hardware requirements are:
CPU: Intel Core or Xeon 3GHz (or Dual Core 2GHz) or equal AMD CPU
Cores: Single (Dual/Quad Core is recommended)
RAM: 4 GB (6 GB recommended)
Graphic Accelerators: nVidia or ATI with support of OpenGL 1.5 or higher
Display Resolution: 1280×1024 is recommended, 1024×768 is minimum.